Line data    Source code

       1           0 : // Distributed under the MIT License.
       2             : // See LICENSE.txt for details.
       3             : 
       4             : #pragma once
       5             : 
       6             : #include <algorithm>
       7             : #include <array>
       8             : #include <cstddef>
       9             : #include <tuple>
      10             : #include <utility>
      11             : 
      12             : #include "DataStructures/DataBox/DataBox.hpp"
      13             : #include "DataStructures/DataBox/ObservationBox.hpp"
      14             : #include "DataStructures/DataBox/TagTraits.hpp"
      15             : #include "Domain/Amr/Flag.hpp"
      16             : #include "Domain/Amr/Helpers.hpp"
      17             : #include "Domain/Amr/Tags/Flags.hpp"
      18             : #include "Domain/Structure/Element.hpp"
      19             : #include "Domain/Structure/ElementId.hpp"
      20             : #include "Domain/Structure/Neighbors.hpp"
      21             : #include "Domain/Tags.hpp"
      22             : #include "Parallel/GlobalCache.hpp"
      23             : #include "Parallel/Invoke.hpp"
      24             : #include "ParallelAlgorithms/Amr/Actions/UpdateAmrDecision.hpp"
      25             : #include "ParallelAlgorithms/Amr/Criteria/Criterion.hpp"
      26             : #include "ParallelAlgorithms/Amr/Criteria/Tags/Criteria.hpp"
      27             : #include "ParallelAlgorithms/Amr/Policies/EnforcePolicies.hpp"
      28             : #include "ParallelAlgorithms/Amr/Policies/Tags.hpp"
      29             : #include "ParallelAlgorithms/Amr/Projectors/Mesh.hpp"
      30             : #include "Utilities/ErrorHandling/Error.hpp"
      31             : #include "Utilities/Gsl.hpp"
      32             : #include "Utilities/MakeArray.hpp"
      33             : #include "Utilities/PrettyType.hpp"
      34             : #include "Utilities/TMPL.hpp"
      35             : 
      36             : /// \cond
      37             : namespace tuples {
      38             : template <class... Tags>
      39             : class TaggedTuple;
      40             : }  // namespace tuples
      41             : /// \endcond
      42             : 
      43             : namespace detail {
      44             : template <typename Criterion>
      45             : struct get_tags {
      46             :   using type = typename Criterion::compute_tags_for_observation_box;
      47             : };
      48             : 
      49             : }  // namespace detail
      50             : 
      51             : namespace amr::Actions {
      52             : /// \brief Evaluates the refinement criteria in order to set the amr::Info of an
      53             : /// Element and sends this information to the neighbors of the Element.
      54             : ///
      55             : /// DataBox:
      56             : /// - Uses:
      57             : ///   * domain::Tags::Element<volume_dim>
      58             : ///   * amr::Tags::NeighborInfo<volume_dim>
      59             : ///   * amr::Criteria::Tags::Criteria (from GlobalCache)
      60             : ///   * amr::Tags::Policies (from GlobalCache)
      61             : ///   * any tags requested by the refinement criteria
      62             : /// - Modifies:
      63             : ///   * amr::Tags::Info<volume_dim>
      64             : ///
      65             : /// Invokes:
      66             : /// - UpdateAmrDecision on all neighboring Element%s
      67             : ///
      68             : /// \details
      69             : /// - Evaluates each refinement criteria held by amr::Criteria::Tags::Criteria,
      70             : ///   and in each dimension selects the amr::Flag with the highest
      71             : ///   priority (i.e the highest integral value).
      72             : /// - If necessary, changes the refinement decision in order to satisfy the
      73             : ///   amr::Policies
      74             : /// - An Element that is splitting in one dimension is not allowed to join
      75             : ///   in another dimension.  If this is requested by the refinement critiera,
      76             : ///   the decision to join is changed to do nothing
      77             : /// - Checks if any neighbors have sent their AMR decision, and if so, calls
      78             : ///   amr:::update_amr_decision with the decision of each neighbor in
      79             : ///   order to see if the current decision needs to be updated
      80             : /// - Sends the (possibly updated) decision to all of the neighboring Elements
      81           1 : struct EvaluateRefinementCriteria {
      82             :   template <typename ParallelComponent, typename DbTagList,
      83             :             typename Metavariables>
      84           0 :   static void apply(db::DataBox<DbTagList>& box,
      85             :                     Parallel::GlobalCache<Metavariables>& cache,
      86             :                     const ElementId<Metavariables::volume_dim>& element_id) {
      87             :     constexpr size_t volume_dim = Metavariables::volume_dim;
      88             :     auto overall_decision = make_array<volume_dim>(amr::Flag::Undefined);
      89             : 
      90             :     using compute_tags = tmpl::remove_duplicates<tmpl::flatten<tmpl::transform<
      91             :         tmpl::at<typename Metavariables::factory_creation::factory_classes,
      92             :                  Criterion>,
      93             :         detail::get_tags<tmpl::_1>>>>;
      94             :     auto observation_box =
      95             :         make_observation_box<compute_tags>(make_not_null(&box));
      96             : 
      97             :     const auto& refinement_criteria =
      98             :         db::get<amr::Criteria::Tags::Criteria>(box);
      99             :     for (const auto& criterion : refinement_criteria) {
     100             :       auto decision = criterion->evaluate(observation_box, cache, element_id);
     101             :       for (size_t d = 0; d < volume_dim; ++d) {
     102             :         overall_decision[d] = std::max(overall_decision[d], decision[d]);
     103             :       }
     104             :     }
     105             : 
     106             :     amr::enforce_policies(make_not_null(&overall_decision),
     107             :                           db::get<amr::Tags::Policies>(box), element_id,
     108             :                           get<::domain::Tags::Mesh<volume_dim>>(box));
     109             : 
     110             :     // An element cannot join if it is splitting in another dimension.
     111             :     // Update the flags now before sending to neighbors as each time
     112             :     // a flag is changed by UpdateAmrDecision, it sends the new flags
     113             :     // to its neighbors.  So updating now will save some commmunication.
     114             :     amr::prevent_element_from_joining_while_splitting(
     115             :         make_not_null(&overall_decision));
     116             : 
     117             :     // Check if we received any neighbor flags prior to determining our own
     118             :     // flags.  If yes, then possible update our flags (e.g. sibling doesn't want
     119             :     // to join, maintain 2:1 balance, etc.)
     120             :     const auto& my_element = get<::domain::Tags::Element<volume_dim>>(box);
     121             :     const auto& my_neighbors_amr_info =
     122             :         get<amr::Tags::NeighborInfo<volume_dim>>(box);
     123             :     if (not my_neighbors_amr_info.empty()) {
     124             :       for (const auto& [neighbor_id, neighbor_amr_info] :
     125             :            my_neighbors_amr_info) {
     126             :         amr::update_amr_decision(make_not_null(&overall_decision), my_element,
     127             :                                  neighbor_id, neighbor_amr_info.flags);
     128             :       }
     129             :     }
     130             : 
     131             :     const auto new_mesh = amr::projectors::new_mesh(
     132             :         get<::domain::Tags::Mesh<volume_dim>>(box), overall_decision,
     133             :         my_element, my_neighbors_amr_info);
     134             : 
     135             :     db::mutate<amr::Tags::Info<Metavariables::volume_dim>>(
     136             :         [&overall_decision,
     137             :          &new_mesh](const gsl::not_null<amr::Info<volume_dim>*> amr_info) {
     138             :           amr_info->flags = overall_decision;
     139             :           amr_info->new_mesh = new_mesh;
     140             :         },
     141             :         make_not_null(&box));
     142             : 
     143             :     auto& amr_element_array =
     144             :         Parallel::get_parallel_component<ParallelComponent>(cache);
     145             : 
     146             :     const amr::Info<Metavariables::volume_dim>& my_info =
     147             :         get<amr::Tags::Info<volume_dim>>(box);
     148             :     for (const auto& [direction, neighbors] : my_element.neighbors()) {
     149             :       (void)direction;
     150             :       for (const auto& neighbor_id : neighbors.ids()) {
     151             :         Parallel::simple_action<UpdateAmrDecision>(
     152             :             amr_element_array[neighbor_id], element_id, my_info);
     153             :       }
     154             :     }
     155             :   }
     156             : };
     157             : }  // namespace amr::Actions